Theo Fett Poradie kníh

Focusing on crack growth resistance in ceramics, this booklet explores R-curve behavior, which is characterized by increased resistance during crack propagation. It examines the mechanisms behind this phenomenon, including bridging effects between crack surfaces, phase transformations near the crack tip, and the formation of micro-cracking zones. The discussion emphasizes the significance of bridging behavior and utilizes the fracture mechanics weight function procedure to analyze these observed effects.

Ceramic materials are widely used as components in a great variety of applications. They are attractive due to their good high temperature strength, high wear resistance, good corrosion restistance and other special physical properties. Their major drawback is their brittleness and the large scatter of their mechanical properties. This book describes failure phenomena in ceramic materials under mechanical loading, methods for determining the material properties, and the principles that one should apply when selecting a material. The fracture-mechanical and statistical principles and their use in describing the scatter of strength and lifetime are also covered. Special chapters are devoted to creep behaviour, multiaxial failure criteria and thermal shock behaviour.

The book focuses on the mechanics of cracked components, emphasizing the role of stress around crack tips. It introduces key concepts such as the stress intensity factor (K) and the T-stress, which are essential for understanding the stress state near cracks. The text provides comprehensive data on these parameters through figures, tables, and approximate relations, making it a valuable resource for analyzing failure mechanisms in materials.